In Mexico the girls don't pay the SC owners to work at the place nor they the girls in Mexico make a living by stuffing singles in their thongs as they do in the US.
The top clubs in Mexico do extort the girls in making them work on slow days like MOndays and Tuesdays if in turn, they want to work on Fridays and Saturdays.
The girls at top clubs work by commisions since mainly the money they get goes via the House. They work by quotas to earn their salary, they must make a certain amount of drinks and private dances to get it.
For instance, if a girl does not work on Monday, the next day she goes, she doesn't get her daily salary, just the drink and dance comisions and things get back to normal the following day for the girl.
Or she might be suspended for a day as punishment.
This method of getting the girls by the throat only works at the clubs that manage all the money that the customers pay for the girls, not at places like AB where the girl gets the money directly into her hand.